JP2016094057A - Folding type dolly and handle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handle pushed by hands for a dolly which comprises a loading space and the handle pushed by hands for carrying a burden.SOLUTION: An auxiliary grip part is attached to an upper end grip part of a handle to be extended and contracted. A grip part and the auxiliary grip part comprise a pipe with a circular cross-section. A guide is formed to prevent the rotations of the auxiliary grip part fit in the grip part, and a stopper nail is attached to prevent the auxiliary grip part from dropping out of the grip part in stretching the auxiliary grip part.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a folding cart that can be folded and stored in a small space when not in use, and a handle for the cart.

  Conventionally, a hand cart is used when carrying a heavy or large baggage, and this cart has a plate-shaped cargo platform on which the cargo is placed, and four casters are attached to the lower surface of the cargo platform. A handle for manually pushing the carriage is provided upright at the rear end of the loading platform. Among such carts, there are also folding carts that are compact by folding the handle when not in use. There are also carts that can fold the cargo bed.

  A “folding cart” according to Japanese Patent Application Laid-Open No. 2002-1778928 is a simple structure in which a loading platform and casters can be folded and can be stored compactly. Therefore, a pair of plate-shaped loading platforms positioned horizontally, a plurality of casters mounted on the bottom surface of the loading platform, and casters mounted between the casters and the loading platform so that the axle of the casters is perpendicular to the loading platform. Is held in a foldable manner. A lock pin that holds the caster in a state where the caster is raised is provided, and a hinge that is provided between the pair of loading platforms and is foldably connected with the bottom surfaces of the loading platforms facing each other.

The “hand carriage” according to Japanese Patent Laid-Open No. 2001-287654 is a hand carriage that is suitable for indoor use by devising a folding assembly structure in order to improve the loading efficiency and the storage efficiency as well as the light weight and the design. .
Therefore, the legs with the four legs pivotally connected to the connecting frame so as to be pivotable horizontally, the center frame mounted on the connecting frame so as to move up and down, and the lower sides of the detachable left and right pedestals are respectively located above the legs and the center frame. A pedestal that is shaft-coupled and can be folded along with the rotation of the legs, a lock plate that is slidably mounted on the rear part of the center frame, a latch that protrudes from the lock plate and removably engages with the upper part of the leg, and slides the lock plate A link mechanism that moves, a lock lever that operates it, a connecting frame that can unlock the handle in conjunction with the lock lever, and a handle grip that can be opened and closed via a grip rotation mechanism at the top of the handle Yes.

Further, the applicant has filed a patent application on “Folding Cart” dated May 11, 2006 (Japanese Patent Laid-Open No. 2007-302114).
This folding cart is equipped with a caster at the bottom of the loading platform and can carry the load placed on the loading platform by pushing the handle provided at the rear of the loading platform, and can be folded easily without lifting the cart. It can be moved in a folded state. That is, the loading platform is provided with casters on both bases, and each side end of two loading platform plates connected so as to be foldable via a joint is pivotally supported on a shaft provided on the base. Then, a contact portion that can contact each other in a horizontal state is provided on the center side of the load carrier plate so that the center of both load carrier plates is raised and folded but not lowered downward, and the rear of the base plate A support column on which the leg of the handle is fitted is erected at the end, and the handle is connected through a shaft so that the handle can be folded in half.

A “foldable cart” according to Japanese Patent Laid-Open No. 2013-86748 is an improvement of the “foldable cart” according to Japanese Patent Laid-Open No. 2007-302114.
That is, the carriage is composed of a carriage and a hand handle, and the carriage has a center plate and side plates that are connected to both sides of the carriage so as to be folded vertically downward, and wheels for moving the carriage are attached to the both sides. A storage groove is formed between the center plate and the side plate so that the support column can be stored when the hand push handle is tilted, and lock means is provided to lock the storage plate so that it does not come off in the storage groove.

"Folding cart" according to Japanese Patent Application Laid-Open No. 2002-1778928 "Hand cart" according to JP 2001-287654 A "Folding cart" according to Japanese Patent Application Laid-Open No. 2007-302114 "Folding cart" according to JP2013-86748A

  As described above, there are various types of folding carts, but the size (outer dimensions) in the folded state is large, and often disturbs when stored without being used. The problem to be solved by the present invention is this problem, and provides a folding cart that can be folded into a more compact size and convenient to carry, and its handle.

  The folding cart according to the present invention has a push handle raised at the rear end of the loading platform, and a wheel (caster) is attached to the bottom of the loading platform, and the cart can move by rolling the wheel. . Therefore, the basic form at the time of use is common to the conventional folding cart.

  The loading platform is connected through a connecting member as a three-piece structure with a center plate and both side plates, and forms the same flat surface when a load is loaded, and both side plates are folded vertically downward into a gate-shaped cross-sectional shape when stored. . The hand handle has a generally portal shape with a grip portion connecting both the struts and the upper end of the struts, swings about the axis provided on the loading platform and falls down, and enters the storage groove formed between the center plate and the side plate. Both struts fit.

The hand handle is equipped with a lock mechanism that locks in a state where it falls and fits in the storage groove, and can carry a cart that is folded by gripping the grip of the hand handle. Here, the grip portion of the hand handle has an auxiliary grip portion that can be expanded and contracted, and includes a lock mechanism that locks in the extended state.
And the anti-slip sheet | seat is affixed on the surface of a center board and a both-sides board, and the load loaded in the loading platform prevents it from sliding down.

  The both side plates are connected to each other via a connecting member so as to be folded up with respect to the center plate and vertically stand, and the bottom is provided with the connecting member and the link mechanism. Here, the structure of the specific connecting member and the link mechanism is not limited, but the side plate connected by the connecting member is flush with the central plate, and is folded vertically during storage and folded vertically. Locked by. The wheel is attached to the bottom of the side plate. For this reason, if the side plate is folded vertically, the wheel is also collapsed and stored in the portal space.

The cart according to the present invention can carry a load on the loading platform as in the prior art. At this time, the hand handle is generally erected, but when carrying a large load that protrudes from the loading platform, the hand handle can be tilted so as not to get in the way.
And since the anti-slip sheet | seat is affixed on the surface of a loading platform, the luggage | load loaded on the loading platform can be carried without sliding down.
The hand handle can be accommodated in a storage groove formed between the center plate and the side plate when it falls down, and does not protrude from the cargo bed surface, so the hand handle does not interfere with the load to be placed.

  In the folding cart of the present invention, the push handle falls down and fits in the storage groove, and both side plates are folded so that the loading platform has a gate-shaped cross section. The wheels (casters) attached to the bottom of the loading platform fall with the side plates and face inward, and the whole is folded compactly to reduce the storage space. Further, the folded cart can be carried by grasping the grip portion of the push handle, and can be stood vertically and stored with the grip portion facing up.

  The grip portion of the push handle has an auxiliary grip portion that expands and contracts, and when carrying a load, the auxiliary handle is extended and the operation is facilitated by grasping the extended auxiliary handle. In addition, since the auxiliary grip portion is locked so as not to contract in the extended state, the auxiliary grip portion can be stably held. When the both side plates are folded to be compact, the auxiliary handle is shrunk so as not to protrude from the folded side plates.

The Example which shows the folding-type trolley | bogie which concerns on this invention. A folding cart when the handwheel is pushed down. A foldable cart that has a door handle by tilting the handwheel and folding the side plate. A shaft support structure for folding the handle. Connecting structure for folding side plates. It is an Example which shows a grip part, (a) is a case where the auxiliary grip part is contracted, (b) is a case where the auxiliary grip part is extended. FIG. 7 is an AA cross-sectional enlarged view of FIG. 6. A specific example of the stopper mechanism attached to the auxiliary grip.

  FIG. 1 shows an embodiment of a folding cart according to the present invention. In FIG. 1, 1 is a cargo bed, 2 is a hand handle, and 3 is a wheel (caster). The loading platform 1 has a substantially rectangular shape, and a load can be carried on the loading platform 1. The hand handle 2 stands substantially vertically at the center of the rear end of the loading platform 1, and has a grip 4 at the upper end of the hand handle 2. That is, the hand handle 2 has two columns 5 and 5, and the upper ends of both columns 5 and 5 are connected by the grip portion 4.

  The wheels 3, 3... Are attached to the respective corners of the loading platform 1, and can carry the load placed on the loading platform 1 by pushing or pulling with the grip 4 of the hand handle 2. By the way, the cart of the present invention is a folding type, and the loading platform 1 is composed of a center plate 6 and both side plates 7a and 7b, and both side plates 7a and 7b are folded on both sides of the center plate 6 to form a gate shape. I can do it. Further, the hand handle 2 is folded and falls down, so that the columns 5 and 5 can be accommodated in the storage grooves 8a and 8b formed between the central plate 6 and the side plates 7a and 7b. The support columns 5, 5 received in the storage grooves 8 a, 8 b are configured not to protrude from the surface of the loading platform 1.

  FIG. 2 shows a case where the hand push handle 2 is tilted and stored in the storage grooves 8a and 8b. When a large load is placed on the loading platform 1, the push handle 2 is in the way, but as shown in FIG. I can do it. Of course, in this case, the hand handle 2 cannot be used, but it is possible to put the hand on the load placed on the loading platform 1 and push it.

  By the way, an anti-slip sheet is stuck on the surface of the center plate 6 and the side plates 7a and 7b constituting the loading platform 1 so that the load placed on the loading platform 1 does not slide down. The specific type of the non-slip sheet is not limited, but for example, a “non-slip sheet” according to JP-A-11-207874 can be used. Alternatively, the “floor surface structure of luggage room” according to Japanese Patent Application Laid-Open No. 2009-208575 can be adopted for the surface of the loading platform.

  FIG. 3 shows a folded state of the folding cart according to the present invention. Side plates 7a and 7b are connected to both sides of a central plate 6 in the carrier bed 1 of the carriage, and the side plates 7a and 7b are folded vertically downward as shown in FIG. That is, the side plates 7a and 7b stand vertically and serve as legs that support the center plate 6 and can form a portal shape. Here, both support columns 5, 5 of the hand handle 2 are accommodated in storage grooves 8a, 8b formed between the center plate 6 and the side plates 7a, 7b.

  By the way, the side plates 7a and 7b are connected to both sides of the central plate 6 so as to be foldable via connecting members. It consists of. That is, the side plates 7a and 7b cannot stand upright to form a gate shape as shown in FIG. 3 simply by connecting the connecting members with a joint such as a hinge.

As shown in FIG. 3, the cart can be carried with the side plates 7a and 7b folded to form a gate shape. For that purpose, it is necessary to lighten to some extent, but it can be lifted by holding the grip 4 provided at the upper end of the hand handle 2. In this case, the hand push handle 2 that is folded and accommodated in the storage grooves 8a and 8b is locked so as not to come off. Moreover, it can also be carried by putting the hand in the openings 9 a and 9 b formed in the central plate 6 and grasping the partition 10.
In other words, it can be carried upright by holding the grip portion 4, and can also be carried in a horizontal state by putting a hand into the openings 9a, 9b of the central plate 6.

A lever 11 is provided on the front end side of the center plate 6 and is attached so as to be able to swing around a shaft 12 provided at both ends. As shown in FIG. 3, when the handle 2 stored in the storage grooves 8a and 8b is erected, the lock is released by pushing the tip of the lever 11 downward. Conversely, when the handle 2 standing up is tilted as shown in FIG. 1, the lever 11 is operated by pushing the tip of the lever 11 downward.
However, the lock mechanism for locking the handle 2 and the release operation method for releasing the lock are not limited to those shown in FIG.

  When carrying a load on the loading platform 1, the hand handle 2 stands as shown in FIG. 1 and is locked so as not to fall down even if the hand handle 2 is pressed. The hand handle 2 is attached to the rear end of the loading platform 1 so as to be able to swing, and is raised and locked when carrying a load, and is also tilted and locked when stored.

  FIG. 4 is an embodiment showing a shaft support structure provided at the lower end of the hand handle 2. In the figure, 13 is a rotating plate, 14 is a shaft, 15 and 16 are engaging grooves, and 17 is a lock pin. The rotating plate 13 is pivotally supported so as to be rotatable about a shaft 14, and a support column 5 is attached to the rotating plate 13. Accordingly, the hand handle 2 swings with the rotation of the rotating plate 13 and can fall or stand up.

  The figure shows a case where the hand push handle 2 is standing up, and a lock pin 17 is fitted in an engaging groove 15 formed in the rotating plate 13, so that the rotating plate 13 is prevented from rotating. When the hand handle 2 is tilted, the rotary plate 13 rotates counterclockwise about the shaft 14, and the lock pin 17 slides on the outer periphery 18 of the rotary plate 13 to enter the engagement groove 16. 16 is fitted and locked. Therefore, when the hand handle 2 is tilted, it is necessary to remove the lock pin 17 from the engaging groove 15, and when the hand handle 2 that is also tilted is erected, it is necessary to remove the lock pin 17 from the engaging groove 16.

  The lock pin 17 is connected to the lever 11. In other words, the lever 11 is connected to the lever 11 via a wire, and if the tip of the lever 11 is pushed down, the lock pin 17 can be disengaged from the engaging grooves 15 and 16, and the rotating plate 13 can be rotated and pushed manually. The handle 2 swings. Here, a spring force acting backward is applied to the lock pin 17, and for this reason, when the rotating plate 13 rotates and reaches a predetermined position, the lock pin 17 naturally engages with the engagement grooves 15, 16. Can fit in.

  FIG. 5 shows a part of the lower surface of the loading platform 1. The central plate 6 and both side plates 7a and 7b are connected so that they can be folded by connecting members 19 attached to the front end portion and the rear end portion. A central connecting member 20 is fixed to the central plate 6, a side connecting member 21a is attached to the side plate 7a so as to be swingable about a shaft 22a, and a side connecting member 21b is also centered on the shaft 22b on the side plate 7b. It is attached so that it can swing. And pin 23a, 23b is attached to the front-end | tip of the side part connection member 21a, 21b, and this pin 23a, 23b is loosely fitted by the long grooves 24a, 24b provided in the center connection member 20. FIG.

  Therefore, when the side plates 7a and 7b are folded, the side connecting members 21a and 21b are swung, and the pins 23a and 23b at the tip are moved to the center side along the long grooves 24a and 24b provided in the central connecting member 20. It will move and be located at the inner edge. As shown in FIGS. 1 and 2, when the center plate 6 and the side plates 7a and 7b are on the same surface and the load is loaded, the pins 23a and 23b are placed on the outer ends of the long grooves 24a and 24b as shown in FIG. Positioned and the movement of the side connecting members 21a, 21b is fixed. That is, the side plates 7 a and 7 b are held on the same plane as the central plate 6.

By the way, the loading platform 1 of the carriage is stored by folding both side plates 7a and 7b vertically downward, but from the state in which both side plates 7a and 7b are flush with the central plate 6 as shown in FIG. In order to fold the side plates 7a and 7b, the central plate 6 is lifted to swing with the weights of the side plates 7a and 7b and folded vertically downward to form a gate shape.
In this case, the wheels 3, 3... Attached to the side plates 7a, 7b are accommodated in a portal-shaped inner space.

By the way, a link mechanism is provided in the vicinity of the connecting member 19 that connects the central plate 6 and the side plates 7a and 7b, and the side plates 7a and 7b folded vertically downward by the link mechanism are locked in that state, and also vertically The side plates 7a and 7b folded downward can be opened horizontally using a link mechanism.
In the present invention, the specific structure of the connecting member 19 is not limited to the embodiment shown in FIG. 5, and the locking device for the side plates 7a and 7b is not particularly limited. For example, it is possible to use a link mechanism employed in a “folding cart” according to Japanese Patent Application Laid-Open No. 2013-86748.

  On the other hand, in the folding cart of the present invention, the grip portion 4 of the handle 2 includes auxiliary grip portions 25 and 25 that can be expanded and contracted so that the length thereof can be adjusted. FIG. 6 shows the grip portion 4 of the handle 2. FIG. 6A shows the case where the auxiliary grip portions 25, 25 are contracted, and FIG. 6B shows the case where the auxiliary grip portions 25, 25 are extended. Yes. Therefore, when the carriage is pushed, the auxiliary grips 25, 25 are generally used in an extended state.

FIG. 7 shows an AA cross-sectional enlarged view of FIG. The grip portion 4 and the auxiliary grip portions 25, 25 have a circular cross section so that they can be easily gripped. For this purpose, a guide is provided so that the auxiliary grip portions 25, 25 do not rotate. The grip portion 4 is formed of a circular cross-section pipe, and guide pieces 26 and 26 protrude from the inner periphery along the longitudinal direction.
Although the guide pieces 26 and 26 protrude in two opposing positions on the inner periphery of the grip portion 4 in the same figure, the number of the guide pieces is not particularly limited.

The auxiliary grip portion 25 is fitted to the grip portion 4 and has concave grooves 27, 27,... In the longitudinal direction on the outer periphery, and the grip portion 4 is inserted into the concave grooves 27, 27,. Guide pieces 26 are provided so as to protrude from the inner periphery. Therefore, the auxiliary grips 25 and 25 can be fitted to the grip 4 and can be expanded and contracted without rotating. Therefore, when a load is loaded on the loading platform 1 and the cart is pushed, the auxiliary grip portions 25 and 25 can be extended, and the cart can be pushed by holding the auxiliary grip portions 25 and 25. A stopper mechanism is provided so as not to come out of the grip portion 4 when the auxiliary grip portions 25, 25 are extended.
The auxiliary gripping portion 25 shown in the figure is also made of a thin circular cross-section pipe like the gripping portion 4, and for this purpose, convex portions 28, 28... Projecting inward from the inner periphery of the auxiliary gripping portion 25 are provided. Grooves 27, 27... Are formed in the outer peripheral surface 32 at the positions of the convex portions 28, 28.

FIG. 8 shows a claw 29 attached to the auxiliary grip 25. The claw 29 is constituted by a spring plate 30, and the claw 29 is formed at the tip of the spring plate 30, and the claw 29 protrudes from the outer periphery of the auxiliary grip portion 25.
That is, the base portion of the spring plate 30 is screwed to the bottom piece 31 of the convex portion 28 provided in the auxiliary gripping portion 25, and the claw 29 is passed through the hole provided in a part of the bottom piece 31 and protrudes from the outer peripheral surface 32.

In a state where the auxiliary grip portion 25 is fitted in the grip portion 4, the claw 29 is pushed back by the inner peripheral surface of the grip portion 4.
And the grip part 4 is provided with a hole at a position where the auxiliary grip part 25 cannot be removed when the auxiliary grip part 25 is extended, and the auxiliary grip part 25 slides further by locking the claw 29 to the inner periphery of this hole. Stop without.
By the way, it welds according to the position of the support | pillar 5 of the push handle 2 so that the hole provided in the grip part 4 may not surface. The support column 5 is formed of a pipe, and a surface formed by arranging a hole formed in the grip portion 4 inside the pipe is prevented from being surfaced.

1 Cart 2 Handwheel Handle 3 Casters 4 Grip 5 Strut 6 Center Plate 7 Side Plate 8 Storage Groove 9 Opening
10 partitions
11 Lever
12 axes
13 Rotating plate
14 axes
15 Engagement groove
16 Engagement groove
17 Lock pin
18 circumference
19 Connecting member
20 Central connecting member
21 Side connection member
22 axes
23 pin
24 Long groove
25 Auxiliary grip
26 Guide piece
27 groove
28 Convex
29 claw
30 Spring plate
31 Bottom piece
32 Outer surface

Claims (6)

It is a cart that can carry and carry a load, and the cart is composed of a cargo bed and a hand handle, and the cargo bed has a central plate and side plates that are foldably connected to each other vertically via connecting members, and both side plates. The wheel for moving the carriage is attached to the bottom, and the link mechanism is constructed so that the center plate and the side plate are flush with each other, and the side plate can swing vertically downward to lock in a gate shape. In addition, when the storage handle is formed between the center plate and the side plate and the hand handle is tilted, the support post can be stored, and it is in a standing state so that it does not come off in the storage groove. In the folding cart provided with a locking means for locking the push handle so that it does not fall down, the auxiliary grip part is attached to the upper end grip part of the handle so that it can be expanded and contracted, and the grip part and the auxiliary grip part are circular. It is composed of a pipe on the surface, and a guide is formed so that the auxiliary gripping part fitted in the gripping part does not rotate, and a stopper mechanism is attached so that it does not come out of the gripping part when the auxiliary gripping part is extended. A foldable cart. The folding cart according to claim 1, wherein when the loading platform is folded into a gate shape, the tip end of the folding carrier is not protruded when the auxiliary grip portion is contracted. As the stopper mechanism, the base of the spring plate is screwed to the bottom piece of the convex part provided in the auxiliary grip part, protrudes from the outer peripheral surface through the claw from the hole provided in a part of the bottom piece, and the claw is engaged with the grip part. The folding cart according to claim 1, wherein a hole to be stopped is provided, and the hole is positioned inside a pipe column of the handle. In the handwheel handle of the carriage, which is composed of a loading platform and a handwheel handle and can carry a load, an auxiliary grip portion is attached to the upper end grip portion of the handle so that it can be expanded and contracted, and the grip portion and the auxiliary grip portion are pipes having a circular cross section. The cart handle is characterized in that a guide is formed so that the auxiliary gripping part fitted in the gripping part does not rotate, and a stopper mechanism is attached so that the auxiliary gripping part does not come out from the gripping part when the auxiliary gripping part is extended. . A plurality of guide pieces are provided along the inner periphery of the grip portion, a plurality of convex portions are provided along the inner periphery of the auxiliary grip portion, and a concave groove is formed on the outer peripheral surface at the position of the convex portion. The handle of the cart according to claim 4, wherein the auxiliary grip portion is fitted to the guide portion, and the guide piece of the grip portion is engaged with a concave groove formed on the outer periphery of the auxiliary grip portion. As the stopper mechanism, a spring material is attached to the convex bottom piece of the auxiliary grip part, and a claw formed at the tip of the spring material protrudes from the outer peripheral surface through a hole provided in the bottom piece, and when the auxiliary grip part is extended, the claw part The dolly handle according to claim 4 or 5, wherein the handle is locked in a hole provided in the dolly.

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